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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_SERIAL_SERIAL_PORT_UNDERLYING_SOURCE_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_SERIAL_SERIAL_PORT_UNDERLYING_SOURCE_H_
#include "mojo/public/cpp/system/data_pipe.h"
#include "mojo/public/cpp/system/simple_watcher.h"
#include "services/device/public/mojom/serial.mojom-blink-forward.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise_resolver.h"
#include "third_party/blink/renderer/bindings/core/v8/script_value.h"
#include "third_party/blink/renderer/core/execution_context/execution_context_lifecycle_observer.h"
#include "third_party/blink/renderer/core/streams/underlying_byte_source_base.h"
#include "third_party/blink/renderer/platform/heap/prefinalizer.h"
namespace blink {
class ExceptionState;
class SerialPort;
class SerialPortUnderlyingSource : public UnderlyingByteSourceBase,
ExecutionContextLifecycleObserver {
USING_PRE_FINALIZER(SerialPortUnderlyingSource, Dispose);
public:
SerialPortUnderlyingSource(ScriptState*,
SerialPort*,
mojo::ScopedDataPipeConsumerHandle);
// UnderlyingByteSourceBase
ScriptPromise<IDLUndefined> Pull(ReadableByteStreamController* controller,
ExceptionState&) override;
ScriptPromise<IDLUndefined> Cancel() override;
ScriptPromise<IDLUndefined> Cancel(v8::Local<v8::Value> reason) override;
ScriptState* GetScriptState() override;
void ContextDestroyed() override;
void SignalErrorOnClose(device::mojom::blink::SerialReceiveError);
void Trace(Visitor*) const override;
private:
// Reads data from |data_pipe_|. Arms |watcher_| if it needs to wait.
void ReadDataOrArmWatcher();
void OnHandleReady(MojoResult, const mojo::HandleSignalsState&);
void OnFlush(ScriptPromiseResolver<IDLUndefined>*);
void PipeClosed();
void Close();
void Dispose();
// TODO(crbug.com/1457493) : Remove when debugging is done.
MojoResult invalid_data_pipe_read_result_ = MOJO_RESULT_OK;
mojo::ScopedDataPipeConsumerHandle data_pipe_;
mojo::SimpleWatcher watcher_;
const Member<ScriptState> script_state_;
const Member<SerialPort> serial_port_;
Member<ReadableByteStreamController> controller_;
ScriptValue pending_exception_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_SERIAL_SERIAL_PORT_UNDERLYING_SOURCE_H_
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